Fireproof floor and ceiling construction.



- J. G. EIPLER. PIREPROOF FLOOR AND CEILING CONSTRUCTION.

APPLICATION FILED JUNE 9, 1911.

Patented J an. 2, 1912.

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ATTORNE V8.

COLUMBIA PLANOURAPH C0,,WASHINGTON, D c.

UNITED STATES PATENT QFFICE.

JOHAN G. EIFLER, OF NEW YORK, N. Y., ASSIGNOR 0F ONE-THIRD TO ERNSTEBBINGHAUS, OF NEW YORK, N. Y.

FIREPROOF FLOOR AND CEILING CONSTRUCTION.

To all whom it may concern:

Be it known that I, JoHAN G. EIFLER, a citizen of the United States, andresiding at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Fireproof Floor andCeiling Constructions, of which the following is a specification, suchas will enable those skilled in the art to which it appertains to makeand use the same.

This invention relates to fireproof floor and ceiling constructions andit consists in an improved form" of'arch beam, a number of which areplaced, in practice, between two I-beams in forming the floor andceiling construction of a fireproof building.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawing forms a part, in which the separate partsof my improvement are desig nated by suitable reference characters ineach of the views, and in which Figure 1 is a sectional View of a partof a floor and ceiling construction showing two I-beams in cross sectionand the method of placing my improved arch beams in position and givingalso a side view of one of said beams and a longitudinal centralsectional view of the end portion of two other beams, and: Fig. 2 apartial transverse section on the line 22 of Fig. 1 and showing a numberof arch beams in transverse section and the ends of other beams inelevation and showing the method of using concrete in connection with oron said beams.

In Fig. l of the accompanying drawing I have shown at a two I-beams andat b one of my improved arch beams. The arch beams 22 as shown in Figs.1 and 2 comprise a central longitudinal body portion 6 and a baseportion 72 and the body portion 5 is in the form of an inverted V andthe sides thereof are provided with longitudinal arch-shaped portions72* the transverse thickness of which including the central body portionis the same as that of the transverse base portion 6 The base portion 6is provided on one side thereof with a longitudinal rib and on theopposite side with a corresponding longitudinal groove 1)? and thearch-shaped side portions b are provided on one side with a longitudinalrib b and on the opposite side with a corresponding longitudinal groove6 and by Specification of Letters Patent.

Application filed June 9, 1911.

Patented Jan. 2, 1912. Serial No. 632,113.

means of this construction, when a number of said arch beams are placedtogether, as shown in Fig. 2, they are interlocked; the ribs and bfitting in the grooves 72 and Z1 The inclined sidesof the longitudinalbody portion 6 are also provided near the top thereof with longitudinalgrooves and the ends of the base portion 6 are provided with transversegrooves or recesses 6 into which the bottom flanges a of the I-beams afit when said arch beams are placed in position as clearly shown inFig. 1. The arch beams b are also preferably provided with centrallongitudinal recesses or passages Z2 whereby the amount of material usedtherein and the weight thereof are decreased, but these longitudinalrecesses or passages may be omitted if desired.

The vertical dimensions of the arch beams b are less than the verticaldimensions of the I-beams a and when said arch beams are placed inposition they are covered with concrete as shown at c, and this concreteextends above the I-beams and is preferably provided with a smoothfinish c which forms the floor of one compartment while the undersurface of the arch beams form the ceiling of another compartment andthis surface may be covered if desired, with any suitable material.

The concrete 0' as shown in Fig. 2 fills the spaces between the topportions of the arch beams and fills the grooves 6 and this alsostrengthens said arch beams.

The central portion of Fig. 1 shows one of the beams in side elevationwhile the end portions of said figure show the end portions of two otherarch beams in central longitudinal vertical section.

By means of my improved arch beams I am able to provide a floor andceiling construction of the class specified at a comparativelyreasonable cost, possessing all the requisite strength; and in practice,my improved arch beams are made of concrete and may be reinforced ifdesired in the usual or in any desired manner.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is

An arch beam for use in concrete floor and ceiling constructions,comprising a base portion and a top portion, the side parts of the baseportion being arch-shaped in form and recesses adapted to receive thebase flanges of Ibeams.

In testimony that I claim the foregoing as my invention I have signed myname in presence of the subscribing witnesses this 15 8th day of June,1911.

J OI-IAN Gr. EIFLER.

of the same thickness throughout and the top portion being in the formof a central raised longitudinal web which extends above the arch-shapedside portions and the top of which is parallel with the bottom surfaceof the beam, the opposite sides of the archshaped side portions beingalso provided one with longitudinal grooves and the other \Vitnesses:with corresponding longitudinal ribs, and C. E. MULREANY, the ends ofthe beam being provided wit-h F. G. A'r LEE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

